苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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杂志简介

主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
hunnitu 微信公众号
hunnitu 扫码订购杂志

混凝土研究

新拌UHPC净浆的工作性与流变性试验研究
新拌UHPC净浆的工作性与流变性试验研究
  • 黄 静1,季文玉1,阎培渝2
2022年第1期
摘要
引用本文
摘   要:通过正交试验研究了水胶比、超细粉煤灰掺量和硅灰掺量对新拌UHPC净浆的工作性与流变性的影响,选取流动度、黏度系数和水膜层厚度为工作性与流变性的衡量指标,利用综合平衡法获得了最优配合比。试验结果表明:水胶比、超细粉煤灰掺量和硅灰掺量的提高都会造成UHPC净浆的流动度和颗粒表面水膜层厚度增大,黏度系数减小;超细粉煤灰掺量是净浆工作性和流变性的主要影响因素,水胶比次之,硅灰掺量的影响最小;UHPC最优配合比:水胶比为0.2,超细粉煤灰掺量为40%,硅灰掺量为8%;以该配合比的成型的UHPC 28 d抗压强度为128.8 MPa,抗拉强度为20.3 MPa,同时满足工作性和力学性能要求,且经济合理。 Abstract: An orthogonality test was carried out for study on the effect of W/C ratio, the superfine fly ash and silica fume content on workability and rheological properties of fresh paste of UHPC, and flow spread, consistency coefficient and water film thickness on particles were taken as the measures of workability and rheological properties. The comprehensive balance method was used to obtain the optimal mix proportion of UHPC. The results show that the increase of W/C ratio, the superfine fly ash and silica fume content of UHPC enhances its water film thickness on particles and flowability, reduces its coefficient of viscosity. The superfine fly ash content is the main factor that affects the workability and rheological properties of UHPC, followed by W/C ratio and silica fume content. The optimal mix proporition of UHPC of the W/C is 0.2, superfine fly ash content of 40% and silica fume content of 8%. The 28 d compressive strength of the UHPC is 128.8 MPa and its flexurary strength is 20.3 MPa. It shows a satisfied workability and mechanical properties, as well as a reasonable economy.
黄静,季文玉,阎培渝.新拌UHPC 净浆的工作性与流变性试验研究[J].混凝土与水泥制品,2022(1):1-6. HUANG J,JI W Y,YAN P Y.Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC[J].China Concrete and Cement Products,2022(1):1-6.
陶砂对3D打印砂浆力学与微观性能的影响
陶砂对3D打印砂浆力学与微观性能的影响
  • 陈传峰,刘晨曦,李思琪,孙传珍,冯竟竟
2022年第1期
摘要
引用本文
摘   要:用陶砂部分替代河砂制备了3D打印砂浆,并对该砂浆的流动性、抗压强度以及微观孔结构进行了研究。试验结果表明:砂浆的流动度在170~180 mm时具有良好的可打印性;随陶砂掺量的增加,3D打印砂浆的抗压强度降低,当陶砂的体积掺量为30%时,砂浆试件28 d的抗压强度为14.7 MPa;随着陶砂掺量的增大,砂浆3 d龄期的孔隙率呈现先增大后减小的趋势,其中,陶砂体积掺量为30%时,砂浆的孔隙率最小,此时无害孔和少害孔所占的比例最大。 Abstract: Ceramic sand was used to partially replace river sand, and the fluidity, compressive strength and microscopic pores structure of 3D printed mortar were studied. The test results show that the mortar has good printability when the fluidity is 170~180 mm. With the increase of ceramic sand content, compressive strength of 3D printed mortar decreses. When the volume content of ceramic sand is 30%, the 28 d compressive strength of mortar test block is 14.7 MPa. With the increase of ceramic sand content, the porosity of mortar at 3 d increases first and then decreases. When the volume content of ceramic sand is 30%, the porosity of mortar is the smallest, and the proportion of harmless holes and less harmful holes is the largest.
陈传峰,刘晨曦,李思琪,等.陶砂对 3D 打印砂浆力学与微观性能的影响[J].混凝土与水泥制品,2022(1):7-11. CHEN C F,LIU C X,LI S Q,et al.Influence of Ceramic Sand on Mechanical and Microscopic Properties of 3D Printed Mortar[J].China Concrete and Cement Products,2022(1):7-11.
微珠对隧道工程混凝土性能的影响及机理研究
微珠对隧道工程混凝土性能的影响及机理研究
  • 王 涛1,胡 琪1,吴绍明2,储洪强1,陈 峰2,赵文文1,丁天云1,蒋林华1
2022年第1期
摘要
引用本文
摘   要:针对广州新白云国际机场隧道工程建设中大体积混凝土的温度裂缝问题,通过复掺微珠和粉煤灰,研究了微珠掺量对混凝土的力学性能、干燥收缩、水化热以及早期抗裂性能的影响,并采用SEM分析了微珠对水泥水化反应的作用机理。结果表明:当矿物掺合料总量一定时,随着微珠掺量的增加,混凝土的力学性能早期变化较小,后期呈现出先增加后下降的趋势,且微珠掺量为10%时,混凝土养护60 d的抗压强度、劈裂抗拉强度以及弹性模量最高;混凝土干缩率随着微珠掺量的增加而减小,且这种趋势随龄期的增加而增大,当微珠掺量15%时,60 d混凝土的干缩率最小;当微珠掺量为10%时,混凝土早期抗裂性能最佳,平板试件表面24 h内无裂缝;微珠掺量对胶凝材料水化热总量影响较小,但对水化放热峰值及峰值产生时间影响较大;微珠可以加速浆体早期的水化进程,减少硬化浆体的孔隙,使其结构更密实。 Abstract: In order to solve the temperature crack problem of the mass concrete structure in the construction of the Guangzhou New Baiyun International Airport tunnel engineering, the mechanism and effect of microbeads content on the macro-performance of concrete were performed, which specifically includes mechanical properties, dry shrinkage performance, heat hydration and early cracking resistance. Moreover, SEM was used for exploring the influence of microbeads on the hydration of cement. The results show that with the increase of microbeads content, the mechanical properties of concrete present no changes in the early stages, and increases first, then decreases in the later stages when the total content of mineral admixture is unchanged. When microbeads content is 10%, the compressive strength, splitting tensile strength and elastic modulus of concrete at 60 d are the highest. The dry shrinkage rates of concrete decrease with the increase of microbeads content, and the improvement becomes even bigger with the increase of curing age. The dry shrinkage of concrete at 60 d is the smallest when the content of microbeads is 15%. The early cracking resistance of concrete is the best with 10% microbeads, which can be manifested as no obvious cracks on the surface of the flat specimen within 24 h. Microbeads has little impact on the total hydration heat, and has a great influence on the peak and its arrival time of hydration exothermic rate. Microbeads can accelerate the early hydration process of cement and decrease the porosity of cement paste, which can make microstructure denser.
王涛,胡琪,吴绍明,等.微珠对隧道工程混凝土性能的影响及机理研究[J].混凝土与水泥制品,2022(1):12-16,21. WANG Tao, HU Qi, WU Shao-ming,et al.Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering[J].China Concrete and Cement Products,2022(1):12-16,21.
隧道衬砌混凝土抗溶蚀性能影响因素研究
隧道衬砌混凝土抗溶蚀性能影响因素研究
  • 田 钊1,周 莹2,3,伍 洲1,穆 松2,3,张建喜4,刘 凯2,3
2022年第1期
摘要
引用本文
摘   要:以广东某隧道工程为例,研究了水胶比、矿物掺合料和砂率对混凝土早期抗压强度、抗渗性能、抗氯离子渗透性能和抗溶蚀性能的影响。结果表明:随着水胶比的减小,混凝土早期抗压强度、抗渗性能、抗氯离子渗透性能和抗溶蚀性能均提高;掺入适量的矿物掺合料降低了混凝土的早期抗压强度和抗渗性能,但提高了混凝土的抗氯离子渗透性能和抗溶蚀性能;随着砂率的增加,混凝土的早期抗压强度先降低后提高,抗渗性能、抗氯离子渗透性能、抗溶蚀性能提高,最佳砂率为45%;综合对比得到了各因素对混凝土抗溶蚀性能的提高效果为:水胶比>矿物掺合料>砂率。 Abstract: Taking a tunnel project in Guangdong as an example, the effects of water-binder ratio, mineral admixture and sand ratio on the early compressive strength, impermeability, resistance to chloride ion penetration and corrosion resistance of concrete were studied. The results show that as the water-binder ratio decreases, the early compressive strength, impermeability, resistance to chloride ion penetration and corrosion resistance of concrete all increase. The appropriate addition of mineral admixtures reduces the early compressive strength and impermeability of concrete, but improves the resistance to chloride ion penetration and corrosion resistance of concrete. As the sand ratio increases, the early compressive strength of concrete decreases first and then increases, and the impermeability, resistance to chloride ion penetration, and corrosion resistance are improved. The best sand ratio is 45%. Comprehensive comparison of the effects of various factors on the anti-corrosion performance of concrete is: water-binder ratio>mineral admixture>sand ratio.
田钊,周莹,伍洲,等.隧道衬砌混凝土抗溶蚀性能影响因素研究[J].混凝土与水泥制品,2022(1):17-21. TIAN Z,ZHOU Yi,WU Z,et al.Study on Factors Affecting the Corrosion Resistance Performance of Tunnel Lining Concrete[J].China Concrete and Cement Products,2022(1):17-21.
低温环境下石灰岩机制砂砂浆抗硫酸盐侵蚀性能研究
低温环境下石灰岩机制砂砂浆抗硫酸盐侵蚀性能研究
  • 邓俊双1,徐志华1,李北星2,李 龙2
2022年第1期
摘要
引用本文
摘   要:为研究低温环境下石灰岩机制砂及石粉对混凝土抗硫酸盐侵蚀性能的影响,以掺/未掺石灰岩石粉的机制砂砂浆、掺/未掺石灰岩石粉的天然砂砂浆为模拟对象,结合硫酸盐腐蚀介质及低温环境特点,采用温度(5±1)℃的5%的MgSO4溶液模拟服役环境,对比研究了不同腐蚀龄期(0 d、60 d、90 d、210 d、270 d、360 d)试件的外观和强度变化,并基于XRD、FTIR测试分析了侵蚀产物。结果表明:随着龄期的增长,侵蚀方式由传统的钙矾石型硫酸盐侵蚀逐渐过渡到以碳硫硅酸钙为侵蚀产物的TSA岩侵蚀;石灰岩机制砂和石粉均能促使砂浆产生TSA侵蚀,且石粉的影响更加明显。 Abstract: In order to study the influence of limestone manufactured sand and limestone rock fines on the sulfate resistance of concrete under low temperature environment, the two kinds of manufactured sand mortars mixed with or without limestone rock fines, and the two kinds of natural sand mortars incorporated with or without limestone rock fines were used as the simulate objects. Combined with the characteristics of sulfate corrosion medium and low temperature environment, 5% magnesium sulfate solution at (5±1)℃ was used to simulate the service environment. The changes of appearance and strength for the mortar specimens at different corrosion ages (0 d, 60 d, 90 d, 210 d, 270 d, 360 d) were compared and studied, and the corrosion products were analyzed by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). The results show that with the increase of erosion age, the erosion mode gradually transits from traditional ettringite type sulfate attack to thaumasite sulfate attack (TSA) with thaumasite as the erosion product. Limestone manufactured sand and limestone rock fines all can promote the TSA of mortar and concrete, and the effect of limestone rock fines is more obvious. 
邓俊双,徐志华,李北星,等.低温环境下石灰岩机制砂砂浆抗硫酸盐侵蚀性能研究[J].混凝土与水泥制品,2022(1):22-26. DENG J S,XU Z H,LI B X,et al.Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment[J].China Concrete and Cement Products,2022(1):2022(1):22-26.
基于细观模型的混凝土力学性能研究进展
基于细观模型的混凝土力学性能研究进展
  • 程 想,曹俊鑫,王玲玲,赵银霜,孔德文
2022年第1期
摘要
引用本文
摘   要:通过细观模型预测方法建立了混凝土骨料特性与宏观力学性能的联系,可实现混凝土力学性能的预测。归纳了混凝土细观模型的主要结构形式及建模方法,总结了骨料体积率、形状、粒径尺寸等对混凝土静、动态力学性能的影响规律,阐述了骨料体积率、分布形式、粒径尺寸等因素对混凝土强度与弹性模量的影响程度。提出了细观模型预测混凝土宏观力学性能研究中待解决的问题。 Abstract: The relationship between the properties of concrete aggregates and the macro-mechanical properties is established through the meso-model prediction method, which can realize the prediction of the concrete mechanical properties. The main structural forms and modeling methods of the concrete meso-model are summarized, and the influence laws of aggregate volume rate, shape, particle size on the static and dynamic mechanical properties of concrete are summarized, and the influence degree of aggregate volume rate, distribution form, and particle size on the strength and elastic modulus of concrete are described. The problems to be solved in the study of the meso-model predicting the macro-mechanical properties of concrete are put forward.
程想,曹俊鑫,王玲玲,等.基于细观模型的混凝土力学性能研究进展[J].混凝土与水泥制品,2022(1):27-32,37. CHENG X,CAO J X,WANG L L,et al.Research Progress in Mechanical Properties of Concrete Based on the Mesoscopic Model[J].China Concrete and Cement Products,2022(1):27-32,37.
珊瑚混凝土的尺寸效应及损伤破坏特征研究
珊瑚混凝土的尺寸效应及损伤破坏特征研究
  • 郭德豪1,张 妍2,周 聪3,黄玉荣4,尚致晨5
2022年第1期
摘要
引用本文
摘   要:利用MTS试验系统,研究了珊瑚混凝土的早期强度增长规律、单轴压缩强度的尺寸效应、破坏模式以及损伤演化特征。结果表明:海水拌制的珊瑚混凝土具有明显的早强特点,养护3 d和7 d试件的相对强度分别可达到0.84和0.90;高径比(长宽比)对试件的单轴压缩强度有较大影响,高径比(长宽比)越大,试件的峰值强度越大,残余强度越小,且表现出显著的脆性破坏特征;单轴压缩条件下,珊瑚混凝土的破坏模式以张拉破坏为主,其破坏形态为断裂裂纹贯穿骨料破坏;借助声发射系统,监测到声发射振铃数与试件的宏观力学性能紧密相关。 Abstract: The MTS test system was utilized to study the early strength growth law, size effect of uniaxial compression strength, failure mode and damage evolution of coral aggregate concrete. The results show that coral aggregate concrete mixed by seawater has obvious characteristics of early strength and its relative strength after curing 3 d and 7 d can reach 0.84 and 0.90 respectively. The uniaxial compressive strength of specimens is significantly affected by height-diameter ratio(length-width ratio). The higher the height-diameter ratio(length-width ratio) is, the higher the peak strength is and the smaller the residual strength is, showing a significant brittle failure characteristic. Under uniaxial compression, the main failure mode of coral aggregate concrete is tensile failure and its fracture surface runs through the aggregate. With the aid of the acoustic emission system, the number of acoustic emission ringing is closely related to the macro-mechanical properties of the specimen.
郭德豪,张妍,周聪,等.珊瑚混凝土的尺寸效应及损伤破坏特征研究[J].混凝土与水泥制品,2022(1):33-37. GUO D H,ZHANG Y,ZHOU C,et al.Study on Size Effect and Failure Characteristics of Coral Aggregate Concrete[J].China Concrete and Cement Products,2022(1):33-37.

水泥混凝土制品

纤维种类对超高性能混凝土电杆性能的影响研究
纤维种类对超高性能混凝土电杆性能的影响研究
  • 骆静静1,田 寅1,张立力1,陈晶晶1,王 涛2,苏 强2
2022年第1期
摘要
引用本文
摘   要:为研究聚丙烯纤维(PP纤维)、耐碱玻璃纤维(BX纤维)、钢纤维(GX纤维)对超高性能混凝土(UHPC)电杆力学性能和耐久性能的影响,在前期掺量优选试验基础上,采用卧式离心工艺成型了规格为?覫190×12×M×BY的UHPC 电杆,并进行了力学性能和耐久性能试验。结果表明:不同纤维种类对UHPC 折压比的影响从高到底依次为:GX纤维、BX纤维、PP纤维;三种纤维均可提高UHPC 的耐久性,但效果不显著;三种纤维对UHPC 电杆力学性能的影响由高到低依次为:GX纤维、BX纤维、PP纤维;三种纤维UHPC 电杆均满足相关标准要求,考虑电杆外观和经济性,可使用PP纤维和BX纤维生产UHPC 电杆。 Abstract: In order to study the effects of polypropylene fiber, alkali resistant glass fiber and steel fiber on the mechanical properties and durability of ultra-high performance concrete poles, based on the preliminary content optimization test, the ?覫190×12×M×BY ultra-high performance concrete poles were produced by horizontal centrifugal process, and the mechanical properties and durability tests were carried out. The results show that the effects of different fiber types on the flexural compression ratio of ultra-high performance concrete from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers can improve the durability of ultra-high performance concrete, but the effect is not significant. The effects of three fibers on the mechanical properties of UHPC poles  from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers all can meet the requirements of relevant standards. Considering the appearance and economy of poles, polypropylene fiber, alkali resistant glass fiber can be recommended to used to produce UHPC poles.
骆静静,田寅,张立力,等.纤维种类对超高性能混凝土电杆性能的影响研究[J].混凝土与水泥制品,2022(1):38-40. LUO J J,TIAN Y,ZHANG L L,et al.Study on the Influence of Fiber Types on the Performance of Ultra-high Performance Concrete Poles[J].China Concrete and Cement Products,2022(1):38-40.
C105管桩混凝土设计参数取值的探讨
C105管桩混凝土设计参数取值的探讨
  • 何友林,茹军辉,李 龙
2022年第1期
摘要
引用本文
通过试验得出了C105混凝土100 mm×100 mm×100 mm立方体非标准试件抗压强度换算系数以及C105混凝土的标准方差和强度变异系数。采用理论计算,得到了棱柱体抗压强度与立方体抗压强度的比值αc1,并与试验实测平均值进行了比较,验证了理论计算方法的可行性。此外,通过对比分析,探讨了直接外延法和引用公式法两种C105混凝土设计参数计算方法的正确性,研究结果可为C105管桩混凝土的设计和应用提供参考。 Abstract: The conversion coefficient of C105 concrete compressive strength was obtained for the size of the 100 mm×100 mm×100 mm cubic specimen by testing. And the standard deviation and strength variable coefficient were obtained by statistical analysis. The ratio αc1 of prismatic compressive strength to cubic compressive strength was obtained by theoretical calculation, and compared with the measured average value, which verifies the feasibility of the theoretical calculation method. In addition, through the comparative analysis, the correctness of the direct epitaxy method and quoted formula method of C105 concrete design parameters was systematically discussed, and the research results can provide a reference for the design and application of C105 pile concrete.
何友林,茹军辉,李龙.C105管桩混凝土设计参数取值的探讨[J].混凝土与水泥制品,2022(1):41-43,47. HE Y L,RU J H,LI L.Discussion on Design Parameters Value Selection of C105 Piles Concrete[J].China Concrete and Cement Products,2022(1):41-43,47.
预制管片混凝土裂缝控制技术研究
预制管片混凝土裂缝控制技术研究
  • 温泉武
2022年第1期
摘要
引用本文
摘 要:为抑止混凝土收缩,配制出满足工作性、力学性能、耐久性要求,又经济合理的预制管片用混凝土,依据SL/T 352—2020《水工混凝土试验规程》,通过降低混凝土浆体总量等方法,试验研究了不同水胶比和粉煤灰掺量对管片用混凝土强度的影响。在配合比优选基础上,提出了管片生产浇筑和养护过程中的工艺控制措施,可为管片的生产提供参考。 Abstract: In order to inhibit concrete shrinkage, and prepare precast segment concrete that meets the requirements of workability, mechanical properties and durability, according to the SL/T 352—2020 Test Code for Hydraulic Concrete, the effects of different water binder ratio and fly ash content on concrete strength are studied by reducing the total amount of concrete slurry. On the basis of mix proportion optimization, the precautions in the process of segment production, pouring and maintenance are put forward, which can provide technical solutions for the production site.
温泉武.预制管片混凝土裂缝控制技术研究[J].混凝土与水泥制品,2022(1):44-47. WEN Q W.Research Crack Control Technology of Precast Segment Concrete[J].China Concrete and Cement Products,2022(1):44-47.

纤维水泥及制品

机制砂超高性能混凝土(UHPC)性能影响因素试验研究
机制砂超高性能混凝土(UHPC)性能影响因素试验研究
  • 马正先,赵雅萌,陈炳江,肖文帅,孙立刚
2022年第1期
摘要
引用本文
摘   要:超高性能混凝土(UHPC)在拥有超高力学性能的同时普遍存在流动性较差的问题。为了寻求二者之间的平衡,首先通过单因素试验分析了石英砂掺量、粉煤灰掺量、减水剂掺量和钢纤维掺量对UHPC流动性及抗压强度的影响,其次利用正交试验得出了各因素对UHPC流动性及抗压强度影响的主次顺序,确定了最优配合比。结果表明:当石英砂掺量为32%(机制砂掺量为68%)、粉煤灰掺量为15%、减水剂掺量为0.39%、钢纤维掺量为2%时,配制出的UHPC工作性和力学性能良好,并成功应用于某高架桥维修加固工程中。 Abstract: Ultra-high performance concrete (UHPC) generally has the problem of poor fluidity while having ultra-high mechanical properties. In order to find the balance between ultra-high mechanical properties and fluidity, firstly, the effects of quartz sand content, fly ash content, water-reducing agent content and steel fiber content on the fluidity and compressive strength of UHPC were analyzed through single factor tests. Secondly, the primary and secondary order of the influence of various factors on the fluidity and compressive strength of UHPC was obtained by orthogonal test, and the optimal mix proportion was determined. The results show that when the content of quartz sand is 32%(the content of machine-made sand is 68%), the content of fly ash is 15%, the content of water-reducing agent is 0.39%, and the content of steel fiber is 2%, the prepared UHPC has good workability and mechanical properties, and has been successfully applied to a viaduct maintenance and reinforcement project.
马正先,赵雅萌,陈炳江,等.机制砂超高性能混凝土(UHPC)性能影响因素试验研究[J].混凝土与水泥制品,2022(1):48-52,63. MA Z X,ZHAO Y M,CHEN B J,et al.Experimental Study on Influencing Factors of Machine-made Sand Ultra-high Performance Concrete (UHPC) Performance[J].China Concrete and Cement Products,2022(1):48-52,63.
PVA纤维混凝土冻融循环损伤规律及模型研究
PVA纤维混凝土冻融循环损伤规律及模型研究
  • 赵小明1,王新科2,乔宏霞2,黄 瑞1
2022年第1期
摘要
引用本文
摘   要:研究了PVA纤维的体积掺量(0.05%、0.10%、0.15%)和长度(8 mm、12 mm)对混凝土相对动弹性模量、质量损失率和力学性能的影响,分析了PVA纤维混凝土的冻融损伤规律,建立了以相对动弹性模量为对象的Weibull概率分布损伤模型。结果表明:随着冻融循环次数的增加,体积掺量为0.10%、长度为8 mm的PVA纤维对混凝土抗冻性能的提升效果最好;建立的Weibull概率分布损伤模型可以有效反映PVA纤维混凝土的冻融损伤劣化规律,可为实际工程应用提供参考。 Abstract: The effects of PVA fiber volume content (0.05%, 0.10%, 0.15%) and length (8 mm, 12 mm) on the relative dynamic elastic modulus, mass loss rate and mechanical properties of concrete were studied, and the freeze-thaw damage law of PVA fiber reinforced concrete was analyzed, and the Weibull probability distribution damage model based on the relative dynamic elastic modulus was established. The results show that with the increase of freeze-thaw cycles, PVA fiber with volume content of 0.10% and length of 8 mm has the best effect on improving the frost resistance of concrete. The established Weibull probability distribution damage model can effectively reflect the freeze-thaw damage and deterioration law of PVA fiber reinforced concrete, and can provide a reference for practical engineering applications.
赵小明,王新科,乔宏霞,等. PVA纤维混凝土冻融循环损伤规律及模型研究[J].混凝土与水泥制品,2022(1):53-57. ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.
混杂纤维再生混凝土轴压应力-应变关系研究
混杂纤维再生混凝土轴压应力-应变关系研究
  • 牛海成1,吉珈琨2,张耀宗1
2022年第1期
摘要
引用本文
摘   要:研究了再生粗骨料取代率、纤维的体积掺量和掺入方式对再生混凝土性能的影响,根据实测应力-应变曲线,计算出了各组试件的压缩韧度指数和弹性模量。结果表明:再生混凝土的抗压强度略低于天然骨料混凝土,掺入纤维可显著提高再生混凝土的抗压强度、韧性和弹性模量;单掺时,对于抗压强度和弹性模量,玻璃纤维、PVA纤维的最佳掺量分别为0.45%、0.05%,对于韧性,玻璃纤维、PVA纤维的最佳掺量分别为0.45%、0.10%;当再生粗骨料取代率为50%时,玻璃纤维和PVA纤维混杂掺加对再生混凝土抗压强度、韧性和弹性模量的提升效果优于单一纤维;当再生粗骨料取代率为100%时,单一纤维对再生混凝土抗压强度、韧性和弹性模量的提升效果优于混杂纤维。 Abstract: The effects of recycled coarse aggregate replacement rate, fiber volume content and fiber mixing method on the properties of recycled concrete were studied. According to the measured stress-strain curve, the compressive toughness index and elastic modulus were calculated. The results show that the compressive strength of recycled concrete is slightly lower than that of natural aggregate concrete, and the addition of fibers can significantly improve the compressive strength, axial toughness and elastic modulus of recycled concrete. In single blending, for compressive strength and elastic modulus, the optimum content of glass fiber and PVA fiber is 0.45% and 0.05% respectively, and for toughness, the optimum content of glass fiber and PVA fiber is 0.45% and 0.10% respectively. When the replacement rate of recycled coarse aggregate is 50%, the improvement effect of mixed addition of glass fiber and PVA fiber on the compressive strength, toughness and elastic modulus of recycled concrete is better than that of single fiber. When the replacement rate of recycled coarse aggregate is 100%, the improvement effect of single fiber on the compressive strength, toughness and elastic modulus of recycled concrete is better than that of hybrid fiber.
牛海成,吉珈琨,张耀宗.混杂纤维再生混凝土轴压应力-应变关系研究[J].混凝土与水泥制品,2022(1):58-63. NIU H C,JI J K,ZHANG Y Z.Stress-strain Relationship of Hybrid Fiber Reinforced Recycled Concrete Under Axial Compression[J].China Concrete and Cement Products,2022(1):58-63.

房建材料及制品

FRP布加固钢筋混凝土短柱轴压性能试验研究
FRP布加固钢筋混凝土短柱轴压性能试验研究
  • 闫清峰1,张纪刚1,2,张宜聪1,张梦琳1,时成龙1
2022年第1期
摘要
引用本文
闫清峰,张纪刚,张宜聪,等.FRP布加固钢筋混凝土短柱轴压性能试验研究[J].混凝土与水泥制品,2022(1):64-70. YAN Q F,ZHANG J G,ZHANG Y C,et al.Experimental Study on Axial Compression Performance of Reinforced Concrete Short Columns Strengthened with FRP Sheets[J].China Concrete and Cement Products,2022(1):64-70.
玄武岩纤维筋混凝土梁正截面抗弯承载力试验研究
玄武岩纤维筋混凝土梁正截面抗弯承载力试验研究
  • 熊琦龙1,周 凯1,范 佩1,吴小勇1,2
2022年第1期
摘要
引用本文
摘   要:为了研究BFRP筋混凝土梁的抗弯性能,进行了不同配筋率和不同配筋形式BFRP筋混凝土梁的四点弯曲试验,分析了试件的跨中挠度、抗弯承载力和裂缝分布规律。结果表明:BFRP筋混凝土梁的弯矩-挠度曲线表现出试件开裂、峰值弯矩为转折点的三折线特征;BFRP筋与钢筋混合配筋梁的弯矩-挠度曲线表现出试件开裂、钢筋屈服和峰值弯矩为转折点的四折线特征;BFRP筋与钢筋混合配筋能提高钢筋混凝土梁的抗弯承载力,减小BFRP筋混凝土梁的挠度和裂缝宽度,同时发挥BFRP筋强度高的特点;BFRP筋与钢筋混合配筋梁符合平截面假定,并给出了正截面抗弯承载力计算公式。 Abstract: In order to study the flexural performance of concrete beams reinforced with BFRP rebar, the four-point bending tests of BFRP reinforced concrete beams with different reinforcement ratios and different reinforcement forms were carried out, and the mid-span deflection, flexural capacity, and crack distribution of the specimens were analyzed. The results show that the bending moment-deflection curves of BFRP reinforced concrete beams show the characteristics of three-fold curve with specimen cracking and peak bending moment as the turning point. The bending moment-deflection curves of beams reinforced with BFRP rebar and steel rebar show the characteristics of four-fold curve with specimen cracking, steel yield and peak bending moment as the turning point. The mixed reinforcement of BFRP rebar and steel rebar can improve the flexural capacity of the reinforced concrete beams, reduce the deflection and crack width of BFRP reinforced concrete beams, and the strength of BFRP rebar can be sufficiently utilized. The beams reinforced with BFRP rebar and steel rebar conform to the plane section assumption, and the calculation formula of flexural capacity of the beams is given.
熊琦龙,周凯,范佩,等.玄武岩纤维筋混凝土梁正截面抗弯承载力试验研究[J].混凝土与水泥制品,2022(1):71-75. XIONG Q L,ZHOU K,FAN P,et al.Experimental Study on Flexural Capacity of Cross Section of Basalt Fiber Reinforced Concrete Beams[J].China Concrete and Cement Products,2022(1):71-75.
混凝土轻质墙板上墙含水率对干燥收缩影响的试验研究
混凝土轻质墙板上墙含水率对干燥收缩影响的试验研究
  • 夏彬华1,杨伟军1,易思容1,杨建宇1,姜鹏霄2
2022年第1期
摘要
引用本文
摘   要:针对混凝土轻质墙板的上墙含水率及其对墙体干缩性能的影响,进行了含水率试验,研究了混凝土轻质墙板上墙含水率对干缩性能及其防裂措施的影响,探索了混凝土轻质墙板干缩随含水率的变化规律,提出了混凝土轻质墙板含水率时变模型,可为墙板合理的养护或上墙时间、干缩裂缝控制提供参考。 Abstract: Aiming at the moisture content during construction of the concrete lightweight wallboard and its influence on the dry shrinkage performance of the wall, the moisture content test was carried out. The influence of moisture content during construction of concrete lightweight wallboard on dry shrinkage performance and crack prevention measures was studied, and the variation law of dry shrinkage of concrete lightweight wallboard with moisture content was studied. Furthermore, the time-varying model of moisture content of concrete lightweight wallboard was put forward. The results can provide a reference for the reasonable maintenance time and the control of dry shrinkage cracks.
夏彬华,杨伟军,易思容,等.混凝土轻质墙板上墙含水率对干燥收缩影响的试验研究[J].混凝土与水泥制品,2022(1):76-79,94. XIA B H,YANG W J,YI S R,et al.Experimental Study on the Effect of Moisture Content During Construction on Dry Shrinkage of Concrete Lightweight Wallboard[J].China Concrete and Cement Products,2022(1):76-79,94.

标准解读

JC/T 2602—2021《预应力混凝土U形板桩》标准解读
JC/T 2602—2021《预应力混凝土U形板桩》标准解读
  • 蒋元海,刘红飞,熊厚仁,黄殿武,华昕若
2022年第1期
摘要
引用本文
摘   要:为便于JC/T 2602—2021《预应力混凝土U形板桩》的使用方准确理解标准条款的具体含义,正确贯彻实施标准条款的具体要求和规定,简述了该标准的编制背景、编制目的和意义,解释说明了标准条款的具体内容,并提出了实施过程中应注意的问题。 Abstract: In order to facilitate the user of JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles is briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.
蒋元海,刘红飞,熊厚仁,等.JC/T 2602—2021《预应力混凝土U形板桩》标准解读[J].混凝土与水泥制品,2022(1):80-83. JIANG Y H,LIU H F,XIONG H R,et al.Interpretation on JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles[J].China Concrete and Cement Products,2022(1):80-83.

节能与环保

废石粉对3D打印水泥砂浆性能的影响研究
废石粉对3D打印水泥砂浆性能的影响研究
  • 邢家瑞,于 淇,全世涛,黎玥琨,刘 超,邓智聪,张亚梅
2022年第1期
摘要
引用本文
摘   要:研究了石材加工产生的废石粉替代部分水泥对3D打印水泥砂浆性能的影响。结果表明:总体上,随着废石粉掺量的增加,砂浆的流动度降低,静态屈服应力提高,但凝结时间变化不明显;通过调整减水剂掺量可以改善废石粉对3D打印水泥砂浆流动性和可建造性的不利影响;废石粉的掺入对3D打印水泥砂浆的力学性能和层间界面黏结强度不利。 Abstract: The effect of replacing part of cement with waste stone powder produced by stone processing on the performance of 3D printing cement mortar was studied. The results show that with the increase of the waste stone powder content, the fluidity of cement mortar decreases and the static yield stress increases in general, but the setting time does not change significantly. The adverse effect of waste stone powder on the fluidity and constructability of 3D printing cement mortar can be improved by adjusting the amount of water reducing agent. The incorporation of waste stone powder is detrimental to the mechanical properties and interface bonding strength of 3D printing cement mortar.
邢家瑞,于淇,全世涛,等.废石粉对3D打印水泥砂浆性能的影响研究[J].混凝土与水泥制品,2022(1):84-88. XING J R,YU Q,QUAN S T,et al.Study on the Influence of Waste Stone Powder on Performance of 3D Printing Cement Mortar[J].China Concrete and Cement Products,2022(1):84-88.
搅拌站废水对混凝土抗冻性能与力学性能的影响研究
搅拌站废水对混凝土抗冻性能与力学性能的影响研究
  • 胡涌琼
2022年第1期
摘要
引用本文
摘   要:研究了搅拌站废水掺量(25%、35%、45%)对混凝土冻融循环后的质量损失、外观形态、动弹性模量及抗压强度的影响规律,建立了掺废水混凝土的冻融损伤模型。结果表明:当废水掺量为25%时,试件的质量损失较大,但抗压强度及动弹性模量仍高于普通混凝土;当废水掺量为35%和45%时,混凝土的抗冻性能得到显著提高,但废水掺量为45%的混凝土动弹性模量下降较快,废水掺量为35%的混凝土抗冻性能最佳;建立的冻融损伤模型能够较好地反映掺废水混凝土的冻融损伤演化规律。 Abstract: The effects of the content of wastewater from concrete mixing station(25%, 35%, 45%) on the mass loss, appearance, dynamic elastic modulus and compressive strength of concrete after freeze-thaw cycle were studied, and the freeze-thaw damage model of concrete mixed with wastewater was established. The results show that when the content of wastewater is 25%, the mass loss of the specimen is large, but the compressive strength and dynamic elastic modulus are still higher than those of ordinary concrete. When the wastewater content is 35% and 45%, the frost resistance of concrete is significantly improved, but the dynamic elastic modulus of concrete with wastewater content of 45% decreases rapidly, and the frost resistance of concrete with wastewater content of 35% is the best. The established freeze-thaw damage model can better reflect the freeze-thaw damage evolution law of concrete mixed with wastewater.
胡涌琼.搅拌站废水对混凝土抗冻性能与力学性能的影响研究[J].混凝土与水泥制品,2022(1):89-94. HU Y Q.Influence of Wastewater from Concrete Mixing Station on the Frost Resistance and Mechanical Properties of Concrete[J].China Concrete and Cement Products,2022(1):89-94.
再生PET塑料骨料对砂浆单轴受压性能的影响
再生PET塑料骨料对砂浆单轴受压性能的影响
  • 陆 俊1,鲍 聪2,方刘基2,占海华3,梁超锋2
2022年第1期
摘要
引用本文
摘   要:利用废弃PET塑料制备了再生PET塑料骨料(RPA),研究了RPA部分取代天然细骨料(0、10%、20%、30%、40%)对砂浆单轴受压性能的影响,并建立了掺RPA砂浆的单轴受压应力-应变本构关系。结果表明:随着RPA取代率的增加,试件的延性增加,应力-应变曲线上升段和下降段斜率逐渐降低,峰值应力和弹性模量逐渐降低;试件的峰值应变、极限应变和抗压韧性指数均随着RPA取代率的增加而增大;建立的掺RPA砂浆单轴受压本构方程计算结果与试验结果吻合较好。 Abstract: Recycled PET plastic aggregate(RPA) was prepared from waste PET plastics. The effect of RPA partially replacing natural fine aggregate (0, 10%, 20%, 30%, 40%) on the uniaxial compressive properties of mortar was studied, and the uniaxial compressive stress-strain constitutive relationship of mortar mixed with RPA was established. The results show that with the increase of RPA replacement rate, the ductility of the specimen increases, the slopes of the rising and falling sections of the stress-strain curve gradually decrease, and the peak stress and elastic modulus gradually decrease. The peak strain, ultimate strain and compressive toughness index increase with the increase of RPA replacement rate. The established constitutive equation of the mortar mixed with RPA under uniaxial compression is in good agreement with the experimental results.
陆俊,鲍聪,方刘基,等.再生PET塑料骨料对砂浆单轴受压性能的影响[J].混凝土与水泥制品,2022(1):95-99. LU J,BAO C,FANG L J,et al.Effect of Recycled PET Plastic Aggregate on Uniaxial Compression Performance of Mortar[J].China Concrete and Cement Products,2022(1):95-99.

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论文推荐

再生混凝土配合比设计初探
再生混凝土配合比设计初探
  • 张亚梅,秦鸿根,孙 伟,郝东明,宁 钟
2002年第2期
摘要
引用本文
摘 要:通过实验研究探索了再生混凝土配合比设计的方法, 提出了在普通混凝土配合比设计的基础上进行废混凝土骨料的预吸水, 并通过掺加优质粉煤灰、减水剂或二者复合, 可成功地配制同时满足工作性和强度要求的再生混凝土。 根据这种方法 , 配制的全部使用废混凝土骨料为粗骨料的再生混凝土28天的抗压强度高达54.6MPa。 Abstract: The approach for the proportion design of recycled aggregate concrete is investigated according to the experimental study.It is suggested that the proportion of cement, sand and aggregate can be calculated based on the current proportion design code for ordinary concrete.As regard to the water content, the water adsorption of waste concrete aggregate within certain time period should also be considered and added to the water content calculated according to the code for ordinary concrete .In addition, the using of good quality fly ash and superplasticizer can improve the strength of recycled aggregate concrete.The highest compressive strength of the concrete, in which all aggregate is insteaded by waste concrete aggregate, is up to 54.6MPa at 28days.
摘 要:通过实验研究探索了再生混凝土配合比设计的方法, 提出了在普通混凝土配合比设计的基础上进行废混凝土骨料的预吸水, 并通过掺加优质粉煤灰、减水剂或二者复合, 可成功地配制同时满足工作性和强度要求的再生混凝土。 根据这种方法 , 配制的全部使用废混凝土骨料为粗骨料的再生混凝土28天的抗压强度高达54.6MPa。 Abstract: The approach for the proportion design of recycled aggregate concrete is investigated according to the experimental study.It is suggested that the proportion of cement, sand and aggregate can be calculated based on the current proportion design code for ordinary concrete.As regard to the water content, the water adsorption of waste concrete aggregate within certain time period should also be considered and added to the water content calculated according to the code for ordinary concrete .In addition, the using of good quality fly ash and superplasticizer can improve the strength of recycled aggregate concrete.The highest compressive strength of the concrete, in which all aggregate is insteaded by waste concrete aggregate, is up to 54.6MPa at 28days.
高性能混凝土———绿色混凝土
高性能混凝土———绿色混凝土
  • 吴中伟
2000年第2期
摘要
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提要:21世纪水泥混凝土面临两大问题:(1)可持续发展问题;(2)可知性问题。本文以前者为主并论述高性能混凝土技术的要点。
绿色高性能混凝土 ———混凝土的发展方向
绿色高性能混凝土 ———混凝土的发展方向
  • 吴中伟
1998年第1期
摘要
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摘要:本文从合理利用资源,保护人类赖于生存的自然环境不遭破坏并实现可持续发展的战略高度出发,论述了混凝土目前及今后的发展方向,提出了发展“绿色高性能混凝土(GHPC)的观点。 Abstract :In this paper the trend of concrete development at present and future has been espounded with a far -sighted strategy , that is reasonably utilizing the resource , protecting the natural environment , which human existance relies on , and realizing the sustainable development .And a point of view for developing Green High Performance Concrete has been put forward .
200~300MPa 活性粉末混凝土(RPC)的配制技术研究
200~300MPa 活性粉末混凝土(RPC)的配制技术研究
  • 何 峰,黄政宇
2000年第4期
摘要
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摘 要:试验研究了原材料品种、 性质及配合比对 RPC 强度的影响;在未掺钢纤维的情况下, 配制出了流动性好, 高温养护(200℃)下抗压强度达 229.0MPa 的超高强混凝土, 在掺钢纤维以及高温养护的情况下 RPC 的抗压强度高达 298.6MPa。 Abstract:ased on experiments , the effects of kinds , properties and proportioning of raw materials on the compressive strength of RPC was studied.As a result, ultra high-strength concrete with excellent fluidity and compressive strength up to 229.0MPa under high temperature curing (200℃)was prepared , while the compressive strength of RPC adding with steel fiber was up to 298.6MPa.
纤维增强—水泥基材料的未来
纤维增强—水泥基材料的未来
  • 吴中伟
1999年第1期
摘要
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一 、大宗建材必须是可持续发展的绿色材料 水泥与水泥基材料是当今最大宗的人造材料 。世 界水泥年产量已超过 15 亿吨 (我国 1997 年为 5.1 亿 吨 ,达世界产量的三分之一), 据此推算 ,水泥基材料总 量在 60~ 70 亿吨上下 。估计所消耗的主要资源为优质 石灰石 15亿吨 、砂石集料 40 亿 m 3 , 排放的 CO 2(主要 温室气体)12亿吨以上 , 还有其他有害气体与大量粉 尘 ,严重污染环境 。如今后几年我国水泥年产量保持在 5亿吨 , 按合理的指标估算 , 每年消耗的能源 、资源与 造成的环境负担如表 1。 可见不论全世界与我国 ,都必须依靠科技 ,大力节 约能源资料 ,保护环境 ,否则水泥与水泥基材料将成为 不可持续发展的材料 。水泥基材料必须向高性能发展 , 向减少用量 , 延长寿命 , 增加功能 , 尤其降低环境代价 的方向努力 。
橡胶粉改性的高韧性混凝土研究
橡胶粉改性的高韧性混凝土研究
  • 宋少民,刘娟红,金树新
1997年第1期
摘要
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摘要 : 本文探讨了 橡胶粉对 混授土 抗折 、 抗压 强 度及抗冲击性 能的影响 。 研 究结 果表明橡胶 粉改性 混 凝土的抗折 、 抗压 强 度 较基准混 凝土 变化不 大 , 冲击荷载则 明 显提 高 。 采用 适当 粘结剂可 以 改善橡胶粉与混 授 土的界面状况 , 大幅度提高混凝土 的抗 冲击性能 。 Abstract: In this paper, the influence of rubber powder on flexural, compr回sive and impact strength of c。ncrete has been studied. The r田ults show that, in comparison with the control, there is lttle diifference to flexural and com pressive strength of the modifiied c。ncrete. H。wever, the impact property w出improved 。bviosly. Further more by using suitable adhesion agent, the interface state between rubber and conorete oan be improved, which greatly benefits the impact property of concrete.
再生混凝土集料的研究
再生混凝土集料的研究
  • 王武祥,刘立,尚礼忠,王玲
2001年第4期
摘要
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摘要:再生集料作为废弃混凝土的主要用途, 其性能及对混凝土的性能影响程度将决定废弃混凝土的再生利用可能, 本文进行了这方面的探索性研究。
高性能减水剂的研究现状与展望
高性能减水剂的研究现状与展望
  • 李崇智,冯乃谦,李永德,覃维祖
2001年第2期
摘要
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摘 要:本文概述了国内外高性能减水剂的主要性能及发展现状, 介绍了高性能减水剂的种类与组成, 提出了有关高性能减水剂的研究内容及今后研究方向。 Abstract:In this paper, the main properties and the present development condition of the high performance water -reducing agent in the world have been summarized, then the composites of various type and something about the research contents and trends have been proposed.
混凝土渗透性与微观结构关系的研究
混凝土渗透性与微观结构关系的研究
  • 李淑进 1, 赵铁军 2, 吴科如 1
2004年第2期
摘要
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摘 要:根据混凝土的渗透性大小与其孔结构参数直接相关的观点, 采用压汞试验测定了水化 60d的水泥浆体孔结构和孔分布情况, 并采用扫描电镜研究了混凝土的微观结构与形貌。结果表明, 水胶比对混凝土的总孔隙率和孔径分布的影响都很大;掺入20%的粉煤灰的混凝土的累积孔隙体积率有所减少, 孔径分布偏向于凝胶孔, 且其微观结构均匀密实, Ca(OH)2 的晶粒含量较少。混凝土微观结构的改善有效地降低了其渗透性。 Abstract:t is directed for correlationship between the permeability and the microstructure parameter of concrete.The porosity and diameter distribution of pores of 60d aged cement mortar are investigated by MIP, and the microstructure of concrete is observed by SEM.The results shows that the water cement ratio largely effects the total pore volume and the diameter distribution and, when added with fly ash by weight of 20%cement content, the total pore volume is decreased.
超高性能混凝土(UHPC)的配制及应用探究
超高性能混凝土(UHPC)的配制及应用探究
  • 李 锋,孔文艺,罗 健,范晓玲,刘思昊
2019年第7期
摘要
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摘   要:选用合适的掺合料,采用正交法和最紧密堆积理论进行了超高性能混凝土(UHPC)基体的配合比实验,通过对力学性能检测,确定了UHPC基体的最优配合比,并在此基础上探究了钢纤维的掺量和掺入方式对UHPC性能的影响。试验结果表明,选用合适的掺合料,通过合适的配合比试验设计能配制出适于应用的UHPC。 Abstract:The mix proportion experiment of ultra high performance concrete without steel fibre was done by using right admixtures as reactive powder, orthogonal experiment and the closest packing experiment as methods. The optimal mix proportion of the ultra high performance concrete without steel fibre was obtained by testing the mechanical properties. And the influence of the incorporation method and the content of steel fiber on the performance of the ultra high performance concrete was studied. The results show that UHPC can also be obtained by using right admixtures and proper mix proportion design.
李锋,孔文艺,罗健,等.超高性能混凝土(UHPC)的配制及应用探究[J].混凝土与水泥制品,2019(7):26-29. LI F,KONG W Y,LUO J,et al.Discussion on Preparation and Application of Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(7):26-29.
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